Sulfur and hot water as a source of health and relaxation hydrothermal sources are sources from which water comes out, which is warmer than normal water. So-called hot springs occur when underground, the water is heated. Tectonic or volcanic activities are usually the cause. Partly, the escaping water reaches temperatures near the boiling point. In some places with thermal springs, cooking in hot springs is a tourist attraction. Emitted sulfur gases are often a byproduct of hot springs. Sulphur in turn is known as medical resources since the middle ages.

Sulfur has on external application antibacterial and funigzid. This means that sulphur can kill both bacteria and fungi and parasites. Because of its relaxing effect, sulphur is also frequently applied in homeopathic treatment methodology. But not only the sulphur thermal water is suitable for therapeutic purposes. They are also very rich in mineral ingredients.

Hot springs are often used to Thermal baths building. These baths use the sulphurous spring water. A visit to the Spa is relaxing. The warm water relaxes muscles and sparked tensions. There are often also artificially created massage nozzles in the thermal pools. Also hot tubs and brine pools are often provided. Usually, more offers complete the swim. Massages and sauna are often such additional services. Depending on the device used in the massage and sauna operation on the thermal water. Hot springs are used not only for medical and therapeutic purposes. They are used also as an alternative energy source. Iceland is considered a pioneer in the use of geothermal energy. Half of the energy demand is covered by energy of sources of there. Places where there is a thermal spring often carry the designation of bathroom in the place name. This is not mandatory but, so the Therme Wien is located in the lower Austrian village Oberlaa in Vienna. The assignment of the name bath is regulated in Germany. Towns may do so only the addition if they have a medical facility for treatment measures.